Elmer Discussion Forum

Hi All, I did a few more tests of the modified solver in more complicated geometries and have to report that the results have not been very promising. The tests worked well with the backward step as we saw before, but as the flow gets a bit more complex (including backflow and circulation), we run i...

Thank you, Wing. All I had to do was to install libblas-dev and liblapack-dev before I started Cmake build and then it worked like a charm. If it is a fresh Ubuntu installation, the gnu compilers for fortran, C, C++ and the mpi versions need to be installed but I had installed OpenFOAM before the El...

Hi Peter, Attached please find the results from the new KESolver of the RevisitBranch. The only changes I made in the sif were: (1) just used 1 Nonlinear System Max Iterations per timestep for both solvers (2) Linear system and steady state convergence tolerances were retained as in the previous sif...

Here are the second set of pictures that show the residual behavior in both cases.
Also attached is the case file.

-Kumar

Thank you for all your efforts, Peter. For the sake of illustrations, comparisons and evaluations w.r.t. the new solver, I am starting with the "old" KESolver as it is implemented (without FCT) in Elmer v8.4. The rest of the post concerns the results obtained from this version (v 8.4) with...

Hi Wolfram, Thanks for your reply. I just did a fresh install of Ubuntu 20.04.1 yesterday on a new hard drive and I haven't installed BLAS separately. I thought that it is included in the mathlibs directory. So do I need to install BLAS before proceeding with CMake? Can the developer version be inst...

Dear All, I recently upgraded my OS to Ubuntu 20.04.1 LTS and was trying to compile Elmer (elmer-devel version) using the CMake procedure described below at the beginning of the thread: http://www.elmerfem.org/forum/viewtopic.php?f=2&t=3742 I used cmake-gui (exactly as suggested for Ubuntu 16.04...

Hi Peter,

Many thanks for your efforts towards the new solver and sorry for not being able to respond earlier. I will do some tests with both the old and new versions and post the results. Thanks again,

-kumar

Hi Peter, Great suggestions, perfectly agree with you on all points. I think the GitHub limit of 500 Mb would be enough for initial testing and joint activities. Once we perfect the reformulated k-e + FCT, the users can test more complicated cases individually at their end and upload to your servers...

Hi, I have found out that Comsol uses the same implementation and tricks as presented in this article by Kuzmin et al. - the article under the link: https://www.researchgate.net/publication/228529803_On_the_implementation_of_the_k-e_turbulence_model_in_incompressible_flow_solvers_based_on_a_finite_e...